77 lines
3.2 KiB
Plaintext
77 lines
3.2 KiB
Plaintext
AST RESEARCH TECHNICAL BULLETIN TB-0067 11-16-84
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CORRECTIONS TO THE ADVANTAGE! USER'S MANUAL VERSION 1.00
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Please note the following correction information to Sections 3
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and 6 of the AST Advantage! User's Manual. This information
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pertains to parallel printer ports and their configuraiton.
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Section 3.3 Step 5 -- Configuring the Parallel Port
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___________________________________________________
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The first paragraph of this section should read as follows:
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You can install a maximum of three parallel printer ports in the
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AT (called LPT1:, LPT2:, LPT3:). The parallel port on the
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ADVANTAGE! has been configured at the factory to respond as
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LPT1:, using IRQ 7. This is the correct configuration for an AT
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with an IBM Color/Graphics display card and no other parallel
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ports installed in the system. If you have an IBM MonoChrome
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display adapter installed in your AT, refer to Section 6.1.2.
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Verify the default configuration of the ADVANTAGE! by comparing
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Switch Block #2 and the IRQ enable block to figure 6-1.
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Table 3-4 Parallel Port Configuration with the MonoChrome Display
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_________________________________________________________________
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This table is in error. If configuring the parallel port as
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LPT2:, the IRQ Jumper needs to be on 5 NOT 7. If configuring the
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Parallel port as LPT3:, there should NOT be a jumper on either 7
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or 5. This is because the AT has not reserved an IRQ for the
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third parallel port of the system.
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Section 6.1.2 MonoChrome Display / Printer Adapter Cards
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________________________________________________________
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This section should read as follows:
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The parallel port on an IBM MonoChrome Display Adapter always
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responds as LPT1: and cannot be reconfigured. If you have this
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type of display adapter in your AT, the parallel port on the
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ADVANTAGE! will automatically respond as LPT2:. However, you
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will need to change the IRQ Jumper from IRQ 7 to IRQ 5 (LPT2:
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will always use IRQ 5).
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Section 6.3 Parallel Port I/O Addresses and Pinouts
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___________________________________________________
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The parallel port on the ADVANTAGE! uses these PC-AT I/O port
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addresses when an IBM MonoChrome Display Adapter is installed:
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AT Parallel Port I/O & IRQ Assignments
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Port I/O Address IRQ Line Used Location of port
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____ ___________ _____________ ________________
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LPT1 3BC-3BF IRQ 7 MonoChrome Display
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LPT2 378-37F IRQ 5 AST ADVANTAGE!
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LPT3 278-27F None* AST ADVANTAGE!
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* Interrupt-driven I/O for LPT3 is not supported in the AT.
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The parallel port on the ADVANTAGE! uses these PC-AT I/O port
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addresses WITHOUT an IBM MonoChrome Display Adapter installed:
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AT Parallel Port I/O & IRQ Assignments
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Port I/O Address IRQ Line Used Location of port
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____ ___________ _____________ ________________
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LPT1 378-37F IRQ 7 AST ADVANTAGE!
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LPT2 278-27F IRQ 5 AST ADVANTAGE!
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LPT3 Not supported without the IBM MonoChrome Display
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Adapter installed.
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